SQLite |从两个（模式）相同的表中检索数据

我有一个SQLite数据库，通过下面的查询从两个表中获取数据

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这是最好、最有表现力的方式吗？我已将报警对象存储在数据库中。因此，很容易会有超过一百万个条目。

对于您的特定查询，最好先限制每个表中的行，如下所示：

with h as (
      select h.*
      from history h
      where Station = @station and TimeStampCome <= @till and TimeStampCome >= @from 
      order by TimeStampCome desc
      limit 101
     ),
     p as (
      select p.*
      from pending p
      where Station = @station and TimeStampCome <= @till and TimeStampCome >= @from 
      order by TimeStampCome desc
      limit 101
     )
select pe.*
from (select h.* from h union all
      select p.* from p
     ) pe
order by TimeStampCome desc
limit 100 offset 1;

但是，如果开始使用不同的偏移，这将变得不太可行

请注意，如果性能是一个问题，请从Station上的索引开始，时间戳出现在两个表中。

Ah这是一个很好的索引提示！我根据提交的过滤器站构建查询，从，到。。。所以这不会是个问题。

with h as (
      select h.*
      from history h
      where Station = @station and TimeStampCome <= @till and TimeStampCome >= @from 
      order by TimeStampCome desc
      limit 101
     ),
     p as (
      select p.*
      from pending p
      where Station = @station and TimeStampCome <= @till and TimeStampCome >= @from 
      order by TimeStampCome desc
      limit 101
     )
select pe.*
from (select h.* from h union all
      select p.* from p
     ) pe
order by TimeStampCome desc
limit 100 offset 1;